lucene/modules/analysis/CHANGES.txt

Analysis Module Change Log

For more information on past and future Lucene versions, please see:
http://s.apache.org/luceneversions

======================= Trunk (not yet released) =======================
   
API Changes

 * LUCENE-2413: Deprecated PatternAnalyzer in common/miscellaneous, in favor 
   of the pattern package (CharFilter, Tokenizer, TokenFilter).  (Robert Muir)

 * LUCENE-2413: Removed the AnalyzerUtil in common/miscellaneous.  (Robert Muir)

 * LUCENE-2167,LUCENE-2699,LUCENE-2763,LUCENE-2847: StandardTokenizer/Analyzer
   in common/standard/ now implement the Word Break rules from the Unicode 6.0.0
   Text Segmentation algorithm (UAX#29), covering the full range of Unicode code
   points, including values from U+FFFF to U+10FFFF
   
   ClassicTokenizer/Analyzer retains the old (pre-Lucene 3.1) StandardTokenizer/
   Analyzer implementation and behavior.  Only the Unicode Basic Multilingual
   Plane (code points from U+0000 to U+FFFF) is covered.

   UAX29URLEmailTokenizer tokenizes URLs and E-mail addresses according to the
   relevant RFCs, in addition to implementing the UAX#29 Word Break rules.
   (Steven Rowe, Robert Muir, Uwe Schindler)

 * LUCENE-1370: Added ShingleFilter option to output unigrams if no shingles
   can be generated. (Chris Harris via Steven Rowe)
   
 * LUCENE-2514, LUCENE-2551: JDK and ICU CollationKeyAnalyzers were changed to
   use pure byte keys when Version >= 4.0. This cuts sort key size approximately
   in half. (Robert Muir)
   
New Features
   
 * LUCENE-2413: Consolidated Solr analysis components into common. 
   New features from Solr now available to Lucene users include:
   - o.a.l.analysis.commongrams: Constructs n-grams for frequently occurring terms
     and phrases. 
   - o.a.l.analysis.charfilter.HTMLStripCharFilter: CharFilter that strips HTML 
     constructs.
   - o.a.l.analysis.miscellaneous.WordDelimiterFilter: TokenFilter that splits words 
     into subwords and performs optional transformations on subword groups.
   - o.a.l.analysis.miscellaneous.RemoveDuplicatesTokenFilter: TokenFilter which 
     filters out Tokens at the same position and Term text as the previous token.
   - o.a.l.analysis.miscellaneous.TrimFilter: Trims leading and trailing whitespace 
     from Tokens in the stream.
   - o.a.l.analysis.miscellaneous.KeepWordFilter: A TokenFilter that only keeps tokens 
     with text contained in the required words (inverse of StopFilter).
   - o.a.l.analysis.miscellaneous.HyphenatedWordsFilter: A TokenFilter that puts 
     hyphenated words broken into two lines back together.
   - o.a.l.analysis.miscellaneous.CapitalizationFilter: A TokenFilter that applies
     capitalization rules to tokens.
   - o.a.l.analysis.pattern: Package for pattern-based analysis, containing a 
     CharFilter, Tokenizer, and Tokenfilter for transforming text with regexes.
   - o.a.l.analysis.synonym.SynonymFilter: A synonym filter that supports multi-word
     synonyms.
   - o.a.l.analysis.phonetic: Package for phonetic search, containing various
     phonetic encoders such as Double Metaphone.

  * LUCENE-2413: Consolidated all Lucene analyzers into common.
    - o.a.l.analysis.KeywordAnalyzer -> o.a.l.analysis.core.KeywordAnalyzer
    - o.a.l.analysis.KeywordTokenizer -> o.a.l.analysis.core.KeywordTokenizer
    - o.a.l.analysis.LetterTokenizer -> o.a.l.analysis.core.LetterTokenizer
    - o.a.l.analysis.LowerCaseFilter -> o.a.l.analysis.core.LowerCaseFilter
    - o.a.l.analysis.LowerCaseTokenizer -> o.a.l.analysis.core.LowerCaseTokenizer
    - o.a.l.analysis.SimpleAnalyzer -> o.a.l.analysis.core.SimpleAnalyzer
    - o.a.l.analysis.StopAnalyzer -> o.a.l.analysis.core.StopAnalyzer
    - o.a.l.analysis.StopFilter -> o.a.l.analysis.core.StopFilter
    - o.a.l.analysis.WhitespaceAnalyzer -> o.a.l.analysis.core.WhitespaceAnalyzer
    - o.a.l.analysis.WhitespaceTokenizer -> o.a.l.analysis.core.WhitespaceTokenizer
    - o.a.l.analysis.PorterStemFilter -> o.a.l.analysis.en.PorterStemFilter
    - o.a.l.analysis.ASCIIFoldingFilter -> o.a.l.analysis.miscellaneous.ASCIIFoldingFilter
    - o.a.l.analysis.ISOLatin1AccentFilter -> o.a.l.analysis.miscellaneous.ISOLatin1AccentFilter
    - o.a.l.analysis.KeywordMarkerFilter -> o.a.l.analysis.miscellaneous.KeywordMarkerFilter
    - o.a.l.analysis.LengthFilter -> o.a.l.analysis.miscellaneous.LengthFilter
    - o.a.l.analysis.PerFieldAnalyzerWrapper -> o.a.l.analysis.miscellaneous.PerFieldAnalyzerWrapper
    - o.a.l.analysis.TeeSinkTokenFilter -> o.a.l.analysis.sinks.TeeSinkTokenFilter
    - o.a.l.analysis.CharFilter -> o.a.l.analysis.charfilter.CharFilter
    - o.a.l.analysis.BaseCharFilter -> o.a.l.analysis.charfilter.BaseCharFilter
    - o.a.l.analysis.MappingCharFilter -> o.a.l.analysis.charfilter.MappingCharFilter
    - o.a.l.analysis.NormalizeCharMap -> o.a.l.analysis.charfilter.NormalizeCharMap
    - o.a.l.analysis.CharArraySet -> o.a.l.analysis.util.CharArraySet
    - o.a.l.analysis.CharArrayMap -> o.a.l.analysis.util.CharArrayMap
    - o.a.l.analysis.ReusableAnalyzerBase -> o.a.l.analysis.util.ReusableAnalyzerBase
    - o.a.l.analysis.StopwordAnalyzerBase -> o.a.l.analysis.util.StopwordAnalyzerBase
    - o.a.l.analysis.WordListLoader -> o.a.l.analysis.util.WordListLoader
    - o.a.l.analysis.CharTokenizer -> o.a.l.analysis.util.CharTokenizer
    - o.a.l.util.CharacterUtils -> o.a.l.analysis.util.CharacterUtils

 * SOLR-1057: Add PathHierarchyTokenizer that represents file path hierarchies as synonyms of
   /something, /something/something, /something/something/else. (Ryan McKinley, Koji Sekiguchi)

Build

 * LUCENE-2413: All analyzers in contrib/analyzers and contrib/icu were moved to the 
   analysis module.  The 'smartcn' and 'stempel' components now depend on 'common'.  
   (Robert Muir)